Analog Devices Inc./Maxim Integrated MAX393CSE+

Overview

MAX393CSE+ from Maxim Integrated is a precision quad SPST analog switch IC designed for low-leakage, low-charge-injection signal routing in ±5V dual-supply systems. It features 100Ω on-resistance (max), <10pC charge injection, ±10nA off-leakage at +25°C, and operates over –40°C to +85°C. It is used in data acquisition front-ends, precision instrumentation multiplexing, and automated test equipment where signal integrity is critical.

For engineers reviewing the MAX393CSE+ datasheet, MAX393CSE+ pinout, MAX393CSE+ application, or MAX393CSE+ equivalent, key selection criteria include guaranteed R_ON flatness across V_COM, sub-10pC charge injection, rail-to-rail analog signal handling, and compatibility with ±5V supplies without external level-shifting.

Technical Context

The MAX393CSE+ implements four independent single-pole single-throw (SPST) switches using enhanced n-channel/p-channel MOSFET topologies optimized for low distortion and minimal signal-dependent on-resistance variation. Its architecture ensures matched channel characteristics and tight R_ON tracking between channels.

It supports dual-supply operation (±3V to ±7.5V) with logic-compatible control inputs referenced to ground, enabling direct interfacing with TTL/CMOS controllers. All channels are fully specified for operation across the full analog input range (V_– to V₊) under guaranteed leakage and R_ON limits.

Key Specifications

Pinout & Package

MAX393CSE+ is housed in a 16-pin SOIC package (width 0.150", JEDEC MS-012AC) with exposed pad for thermal enhancement. Pin numbering follows standard SOIC convention, with pins 1–8 on one side and 9–16 on the other.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with ADG408BRUZ and TS5A23157DCUR, the MAX393CSE+ uniquely delivers guaranteed low charge injection (<10pC) and dual-supply operation (±5V) with industrial temperature support-making it irreplaceable in precision instrumentation multiplexers requiring rail-to-rail analog fidelity and minimal settling artifacts.

Availability

MAX393CSE+ is available at Aetrix Electronics and suitable for instrumentation multiplexing, automated test equipment, medical sensor interfaces, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX393CSE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on precision, power efficiency, and reliability.

The MAX393CSE+ belongs to Maxim's precision analog switch family, engineered specifically for applications demanding low distortion, minimal charge injection, and guaranteed leakage performance in dual-supply environments.

FAQ

What is the maximum allowable supply voltage for MAX393CSE+?

The MAX393CSE+ supports dual-supply operation from ±3V up to ±7.5V. Exceeding ±7.5V risks permanent damage to the internal MOSFET structures. For reliable long-term operation in industrial environments, ±5V is the recommended nominal supply, providing adequate headroom for transients while maintaining optimal R_ON and leakage performance. Always observe absolute maximum ratings in the official MAX393CSE+ datasheet.

Does MAX393CSE+ support single-supply operation?

No, the MAX393CSE+ is not characterized or guaranteed for single-supply operation. Its internal architecture and specifications-including leakage, R_ON, and charge injection-are validated only under dual-supply conditions (e.g., V₊ = +5V, V_– = –5V). Attempting single-supply use (e.g., V₊ = +10V, V_– = 0V) may result in undefined behavior, increased leakage, or failure to meet datasheet guarantees. Use MAX391 or MAX392 variants for single-supply designs.

How does charge injection in MAX393CSE+ affect sample-and-hold circuits?

With guaranteed charge injection <10pC, the MAX393CSE+ minimizes voltage step errors at the hold capacitor in sample-and-hold circuits. For example, in a 10nF hold capacitor, a 10pC injection causes only 1mV step error-well within 12-bit resolution. This enables fast settling and high accuracy without requiring additional correction circuitry, making MAX393CSE+ ideal for precision ADC front-ends where aperture uncertainty must be tightly controlled.

Can MAX393CSE+ be used in hot-swap or live-insertion applications?

The MAX393CSE+ is not designed for hot-swap operation. Its ESD rating (±2kV HBM) does not imply fault tolerance during live insertion. Power sequencing must ensure V₊/V_– supplies are stable before applying logic control signals. Uncontrolled supply ramping or floating supplies during insertion can cause latch-up or parametric shift. For hot-swap applications, consider dedicated hot-swap controllers or analog switches explicitly rated for such use.

What is the thermal resistance (θ_JA) of the MAX393CSE+ in its SOIC package?

The MAX393CSE+ in 16-pin SOIC (CSE package) has a typical junction-to-ambient thermal resistance (θ_JA) of 110°C/W with standard JEDEC 2-layer board layout (1-inch² 2oz copper pad). With proper thermal vias and a 2-inch² ground plane, θ_JA improves to ~65°C/W. The exposed pad (Pin 16) must be soldered to PCB copper to achieve published thermal specs; leaving it unconnected degrades θ_JA by >40%. Always verify junction temperature using T_J = T_A + (P_DISS × θ_JA) in final layout.